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Summary of Significant Accounting Policies - (Advertising Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2023	Dec. 28, 2022	Dec. 29, 2021
Entity Operated Units [Member]
Franchisor Disclosure [Line Items]
Advertising expense	$ 5.6	$ 5.3	$ 4.6
Franchise
Franchisor Disclosure [Line Items]
Advertising expense	$ 78.5	$ 75.9	$ 70.0

X

- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 720
-SubTopic 35
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483406/720-35-50-1

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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